Opportunity ledger / Dossier O-0066
Recurring need documented in 1 independent public source item.
First seen 2026-06-20 · Last updated 2026-07-15 · Recalculated daily
Trend factor ×0.5, capped at 2.0.
我手机上有一些视频文件想要投屏。这些文件格式各异,包括mp4和mkv。 我一直用VLC,但它bug很多。它很难检测到Chromecast——通常我需要先投屏整个屏幕然后再关掉,这样VLC才能识别到Chromecast。然后我需要投屏文件,关闭再打开音频轨道才能让视频显示出来,如此反复。然后通常才能正常工作。 我不想投屏整个屏幕或整个应用——只想投屏文件。有没有什么免费的安卓开源应用能做到这一点? Chinese research excerpt
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Follow the full evidence chain
Traceable items · inspectable scoring · warming and payment alerts
Scoring summary
Evidence confidence = strength × evidence volume × source diversity × payment × competition × trend × 10. Counts use independent content items; only first-hand pain, current spend, explicit willingness to pay and concrete feature requests affect the score. Repeated posts by one author are discounted. Scoring and status changes follow deterministic rules.
“Evidence-backed” means the problem appears real, recurring and connected to spending. It does not mean the business is worth building. Read the full methodology.